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Underscores in constructors #10

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mvarela opened this Issue Jan 19, 2012 · 3 comments

2 participants

@mvarela
mvarela commented Jan 19, 2012

Hi, I believe this is a bug in lhs2Tex-hl.
When there is an underscore in a constructor declaration, e.g.:

data FOO = Bar_A | Bar_B

the formatting generated is

%format Bar_A = " {\lhsCHconstructor{Bar_{A}}}"

which causes LaTeX to choke, as the underscore is not in a math environment.
Maybe outputting an escaped underscore

%format Bar_A = " {\lhsCHconstructor{Bar\_{A}}}"

or formatting the whole thing as a subscript

%format Bar_A = " {\lhsCHconstructor{Bar$_{A}$}}"

would be possible solutions.

Br,
Martin

@mvarela
mvarela commented Jan 19, 2012

Btw, uncommenting line 14 in Language/LaTeX.hs seems to make it work, though I haven't been able to test whether it breaks something else.

. replace "_" "\\_"

@spockz
Owner
spockz commented Jan 19, 2012

The idea is that the system takes care of some formatting for you when you insert a _. Apparently that is broken now, I will look into it.

@mvarela
mvarela commented Jan 19, 2012

Ok, I had understood that from the documentation as well.

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